Chargers Head Coach Marty Schottenheimer used to say that defensive end Luis Castillo was the most athletic 300-pounder he'd ever seen in his life. That's a claim that he can no longer make.

"I'm still 300 pounds at heart," said Castillo.

Physically, Castillo is tipping the scales around 290 these days thanks to an intense offseason training program that the second-year defensive end embarked on to improve his conditioning.</blockquote>
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